[ovirt-users] Re: HA VM and vm leases usage with site failure

Hello, supposing latest 4.4.7 environment installed with an external engine and two hosts, one in one site and one in another site. For storage I have one FC storage domain. I try to simulate a sort of "site failure scenario" to see what kind of HA I should expect. The 2 hosts have power mgmt configured through fence_ipmilan. I have 2 VMs, one configured as HA with lease on storage (Resume Behavior: kill) and one not marked as HA. Initially host1 is SPM and it is the host that runs the two VMs. Fencing of host1 from host2 initially works ok. I can test also from command line: # fence_ipmilan -a 10.10.193.152 -P -l my_fence_user -A password -L operator -S /usr/local/bin/pwd.sh -o status Status: ON On host2 I then prevent reaching host1 iDRAC: firewall-cmd --direct --add-rule ipv4 filter OUTPUT 0 -d 10.10.193.152 -p udp --dport 623 -j DROP firewall-cmd --direct --add-rule ipv4 filter OUTPUT 1 -j ACCEPT so that: # fence_ipmilan -a 10.10.193.152 -P -l my_fence_user -A password -L operator -S /usr/local/bin/pwd.sh -o status 2021-08-05 15:06:07,254 ERROR: Failed: Unable to obtain correct plug status or plug is not available On host1 I generate panic: # date ; echo 1 > /proc/sys/kernel/sysrq ; echo c > /proc/sysrq-trigger Thu Aug  5 15:06:24 CEST 2021 host1 correctly completes its crash dump (kdump integration is enabled) and reboots, but I stop it at grub prompt so that host1 is unreachable from host2 point of view and also power fencing not determined At this point I thought that VM lease functionality would have come in place and host2 would be able to re-start the HA VM, as it is able to see that the lease is not taken from the other host and so it can acquire the lock itself.... Instead it goes through the attempt to power fence loop I wait about 25 minutes without any effect but continuous attempts. After 2 minutes host2 correctly becomes SPM and VMs are marked as unknown At a certain point after the failures in power fencing host1, I see the event: Failed to power fence host host1. Please check the host status and it's power management settings, and then manually reboot it and click "Confirm Host Has Been Rebooted" If I select host and choose "Confirm Host Has Been Rebooted", then the two VMs are marked as down and the HA one is correctly booted by host2. But this requires my manual intervention. Is the behavior above the expected one or the use of VM leases should have allowed host2 to bypass fencing inability and start the HA VM with lease? Otherwise I don't understand the reason to have the lease itself at all.... Thanks, Gianluca _______________________________________________ Users mailing list --users(a)ovirt.org To unsubscribe send an email tousers-leave(a)ovirt.org Privacy Statement:https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct:https://www.ovirt.org/community/about/community-guidelines/ List Archives:https://lists.ovirt.org/archives/list/users@ovirt.org/message/FK...